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YZ 1 - Chapman State Park, PA
Posted by: Groundspeak Regular Member Bon Echo
N 41° 45.257 W 079° 10.294
17T E 652010 N 4624111
Quick Description: USGS Benchmark Disk on the dam at Chapman State Park
Location: Pennsylvania, United States
Date Posted: 12/11/2018 7:06:22 PM
Waymark Code: WMZP1Z
Published By: Groundspeak Premium Member Ernmark
Views: 1

Long Description:
The benchmark disk is located on a small dam within Chapman State Park (no fee for day use visits). It is relatively easy to access the mark on foot.

Enter the Park and park in the lot immediately after crossing the small Farnsworth Branch bridge (the reservoir is visible to your right). Walk back to the roadway and walk 400 feet back to the bridge, crossing over it. Turn left and head towards the dam, walking 230 feet across the lawn to reach the wingwall. The disk is on the top of the wingwall, near the end of the black iron railing.

The BM does not appear on the National Geodetic Survey Data Explorer website, but a description of the mark was found in the PennDOT PAMS Non-Spatial Benchmarks database:
penndotpams.org/NAD27-NGVD29%20Survey%20Control/Warren/USGS%20BMs/Warren.pdf
Described as "Claredon, 5.10 mi SW. of; at Chapman Dam; at top of S. end of W. wall just N. of sloping portion of wingwall; standard tablet stamped "YZ 1 1952" 1436.808
Source: (visit link)
Condition: Mark found in good condition

Designation: YZ 1

Benchmark Agency: U.S. Geological Survey

Monumentation type: BENCH MARK (or B.M.) Disk

County: Warren

USGS 7.5' Topographic Quadrangle Name (optional): WARREN

Find type: Found by luck/skill/knowledge

Local database's URL (optional): [Web Link]

Benchmark Agency (if other): Not listed

Monumentation type (if other): Not listed

Special category (optional): Not listed

Special Category (if other): Not listed

Web address of this benchmark's datasheet (optional): Not listed

NGS PID: Not listed

Visit Instructions:
  1. A closeup photo of the mark taken by you is required.
  2. A 'distant' photo including the mark in the view is highly recommended. Include the compass direction you faced when you took the picture.
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